Overview

• Stellantis and Factorial Energy have validated the FEST semi-solid-state battery, achieving 375 Wh/kg energy density, a significant leap over current lithium-ion batteries.
• The FEST cells enable charging from 15% to 90% in just 18 minutes and maintain performance in temperatures ranging from -30°C to 45°C.
• The technology will be tested in a demonstration fleet of Dodge Charger Daytona EVs starting in 2026 to assess real-world performance.
• The new battery design could reduce vehicle weight by up to 2,000 pounds, enhancing efficiency, performance, and potential cost savings over time.
• Despite these advancements, production challenges persist with high scrap rates and costs 10 to 30 times higher than conventional lithium-ion cells, delaying scalability.